Horizontal and vertical alignment. Possible values: "ALEFT", "ACENTER" and "ARIGHT", combined to "ATOP", "ACENTER" and "ABOTTOM". Default: "ACENTER:ACENTER". Partial values are also accepted, like "ARIGHT" or ":ATOP", the other value will be used from the current alignment. In Motif, vertical alignment is restricted to "ACENTER".

Background color. BGCOLOR is ignored always when FLAT=YES because it will inherit from the native parent. If text and image are not defined, the BGCOLOR is used to show a color not necessary as a background color of the button, in this case set the button size because the natural size will be very small. In Windows, when using the Windows driver or the GTK driver, the BGCOLOR attribute is ignored if text or image is defined. Default: the global attribute DLGBGCOLOR.

Image name of the element when inactive. If it is not defined then the IMAGE is used and the colors will be replaced by a modified version of the background color creating the disabled effect. GTK will also change the inactive image to look like other inactive objects. (GTK 2.6)

Image name of the pressed button. If IMPRESS and IMAGE are defined, the button borders are not shown and not computed in size computation. When the button is clicked the pressed image does not offset. In Motif the button will lose its focus feedback also. (GTK 2.6)

Button's text. If IMAGE is not defined before map, then the default behavior is to contain only a text. The button behavior can not be changed after map. The natural size will be larger enough to include all the text in the selected font, even using multiple lines, plus the button borders. The '\n' character is accepted for line change. The "&" character can be used to define a mnemonic, the next character will be used as key. Use "&&" to show the "&" character instead on defining a mnemonic. The button can be activated from any control in the dialog using the "Alt+key" combination. (mnemonic support since iup-3.0)